우라늄 산화물

그림문자(GHS)

• 그림문자(GHS)

  

• 신호 어

  Danger

• 유해·위험 문구

  H373：장기간 또는 반복 노출되면 장기(또는, 영향을 받은 알려진 모든 장기를 명시)에 손상을 일으킬 수 있음

  H410：장기적 영향에 의해 수생생물에 매우 유독함

• 예방조치문구

  P260：분진·흄·가스·미스트·증기·...·스프레이를 흡입하지 마시오.

  P273：환경으로 배출하지 마시오.

  P314：불편함을 느끼면 의학적인 조치·조언을 구하시오.

  P391：누출물을 모으시오.

  P501：...에 내용물 / 용기를 폐기 하시오.

우라늄 산화물 화학적 특성, 용도, 생산

• 개요

  Uranium dioxide, also known as yellow cake, has a molecular formula of UO2. It is a black crystal that is insoluble in water. It is a high radiation risk and ignites spontaneously in finely divided form. It is used to pack nuclear fuel rods for nuclear reactors.

• 화학적 성질

  URANIUM(IV) OXIDE is black crystals. Insoluble inwater; soluble in nitric acid and concentrated sulfuric acid.

• 물리적 성질

  Brown to black powder or cubic crystals; density 10.97 g/cm³; Mohs hardness 5.5; melts at 2,827°C; insoluble in water and dilute acids; soluble in concentrated acids.

• 용도

  URANIUM(IV) OXIDE is a crystalline (or pellet) form is used to pack nuclear fuel rods.

• 용도

  Used in nuclear power reactors as nuclear-fuel-sintered element containing either natural or enriched uranium.

• 제조 방법

  Uranium dioxide occurs in mineral uraninite. Purified oxide may be obtained from uraninite after purification. The commercial material, however, also is recovered from other uranium sources. Uranium dioxide is obtained as an intermediate during production of uranium metal (See Uranium). Uranyl nitrate, UO₂(NO₃)₂, obtained from digesting the mineral uraninite or pitchblende with concentrated nitric acid and separated by solvent extraction, is reduced with hydrogen at high temperatures to yield the dioxide.

• 위험도

  High radiation risk. Ignites spontaneously in finely divided form.

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